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Add 30/90 and 8/21

30/90 + 8/21 is 5/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 21 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    30/90 = 30 × 7/90 × 7 = 210/630
  3. Likewise, for the 2nd fraction, since 21 × 30 = 630,
    8/21 = 8 × 30/21 × 30 = 240/630
  4. Add the two like fractions:
    210/630 + 240/630 = 210 + 240/630 = 450/630
  5. 450/630 simplified gives 5/7
  6. So, 30/90 + 8/21 = 5/7

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